Arch Resources, Inc. is a leading producer of metallurgical coal and a supplier of premium-quality thermal coal, with operations in the United States. The company's core business is the production and sale of high-quality metallurgical coal, which is used in the production of steel. Arch Resources operates mines in the Appalachian region of the United States, including West Virginia, Kentucky, and Virginia. The company also has a significant presence in the Powder River Basin in Wyoming, where it produces thermal coal for use in power generation. Arch Resources is committed to sustainable mining practices and has implemented a number of initiatives to reduce its environmental impact. The company is headquartered in St. Louis, Missouri, and has approximately 4,000 employees.